CSC Create: Schematic Checker

A countermeasure against griefers who use bugged schematics (just kidding)

Overview

Welcome to CSC. CSC (formerly known as Create:SchematicChecker | Create: Schematic Validation) is a dedicated schematic-scanning mod tailored for Create and all its addons. It can block any recorded potential/malicious vulnerabilities, including but not limited to: item duplication, server lag or even crashes, obtaining creative items, and gaining control of the server. Triggering these vulnerabilities only requires uploading schematics with fixed modified parameters, which makes sabotaging the server extremely easy. As long as the server does not disable schematic cannons, anyone can randomly sabotage the server, crash it, obtain any creative items, and permanently damage any Create survival server—with extremely low costs and minimal time. This mod is designed specifically to address this issue, providing a permanent solution to all problems related to Create schematics! CSC allows users to customize blacklisted tags and blocks, define custom removal rules, and configure and customize the detailed results of schematic validation. Thanks to the universality of schematics, as long as the configuration file is properly designed, CSC can detect any cheating schematics from Create and all its addon mods.
If the user agrees, CSC can even optionally connect to the internet to automatically sync rules to the local server. Whenever the CSC team discovers a new vulnerability, the configuration file will be updated automatically—enabling the automatic removal of potential vulnerabilities without the need to restart the server.

439597651-6bdcd06c-c454-41f0-aa1d-7f8b882064f8

## Q&A / Bug Reports / Support | QQ Group: 1061133894

About this mod

All of this mod’s detection features run completely asynchronously, so they do not consume any of the server’s main thread resources!
It supports custom rules and automatically scans all schematics in the schematic folder for bugs and anomalies, preventing any maliciously tampered NBT schematics from entering your Minecraft server.
It fixes a vast number of Create schematic-related vulnerabilities—including numerous potential blueprint bugs in the latest versions. All relevant fixes and sources of issues are listed at the end.

Features

Automatic Scanning: Automatically checks all schematics in the schematic folder, identifies and filters out potential bugged or anomalous schematics to ensure server security.
Highly Customizable Rules: Allows users to define custom rules for targeted NBT scanning of specific mods.
Conveyor Belt Tampering Validation: Uses a full-validation algorithm to verify conveyor belts in versions 0.5.1 and 6.0.0, blocking bugged conveyor schematics (e.g., duplication, server lag, or crash exploits).
Gear/Cogwheel Pairing Validation: Implements basic matching logic for gear/cogwheel pairs in versions 6.0.0+, preventing known schematic bugs and duplication exploits.
Malicious NBT Scanning: Detects various types of maliciously tampered NBT values to ensure schematic safety.
Automatic Cloud Sync: Automatically updates NBT check rules to block newly discovered bugged schematics.
Auto-Rule Updates: Fully implements automatic rule updates to keep protection up-to-date.

Usage:

Select the appropriate version based on your Create mod version ↓

Custom Rules & Configuration

Log files are stored in the log folder; all uploaded schematics are saved in the save folder.
Rule files generally do not need modification, but if customization is required, simply edit the following fields as needed:

# Core Configuration [check] # Scanning frequency (default: 0.5 seconds) check_frequency = 0.5 # Whether to automatically remove banned blocks fast_handle = false # Whether to count block data in schematics (uses minor resources but enables visualization) count_block = false # Whether to remove all entities from schematics (disables entity spawning in creative schematics but blocks all entity-related duplication exploits) kill_entity = true # Banned entities (entities listed here will be removed from schematics) ban_entity = [ "minecraft:armor_stand" ] # Banned tags: Due to NBT’s recursive hiding mechanism, if a listed tag is detected, the entire schematic will be cleared (NBT structures cannot be partially fixed for tag removal) ban_tags = [ "AttributeModifiers", "Enchantments", # Enchantment tags (blocks creative schematics but also prevents enchanted properties in schematics, as their structures are identical) "using_converts_to", # Food tags (blocks return/duplication exploits) "bundle_contents" # Bundle tags (blocks duplication exploits) ] # Banned blocks (blocks listed here will be removed from schematics; if removal fails, the entire schematic will be cleared) ban_block = [ "create:creative_crate", "create:creative_fluid_tank", "create:creative_motor", "create:creative_blaze_cake", "create:handheld_worldshaper", "minecraft:command_block", # Speaks for itself—this is a command block "minecraft:kelp" # Blocks most GT machines (they cause severe lag!) ]

Fixes for Known Issues

1. Fixed: Exploit allowing creative items to be printed via Lecterns or Clipboards.
Video Link

2. Fixed: Valve data tampering causing variable cache overflow (leads to uncollectible valve entity memory and memory leaks, i.e., "infinite valve spinning" exploit).
Video Link

3. Fixed: Clipboard duplication exploit (enchantment tag removal) | Allows duplication of creative items and printing of clipboards with creative properties.
Video Link

4. Fixed: Blocked conveyor belt length modifications exceeding 1000 blocks | Causes renderer overflow (client crashes) and lag from weakly loaded conveyor chunks.
Video Link

5. Fixed: Blocked printing of conveyor belts with -1 length | Crashes vanilla Forge servers in older versions.
Video Link

6. Fixed: Malicious conveyor length modifications causing massive conveyor "chunk breaking" | Leads to severe server lag, CPU damage, server crashes, and potential world corruption.
Video Link

7. Fixed: Infinite GT (Game Tick) exploit with Kintsugi Decor’s Urns in older versions (allows infinite treasure opening) | GT exploits cause extreme server lag.
Video Link

8. Fixed: Maliciously modified Ejector Plate launch force creating "dragon-slaying cannons" | Instantly crashes Forge servers; ultra-fast launches cause immediate server freezes and rapid chunk generation along the launch path.
Video Link Video Link

9. Fixed: Maliciously modified Filters with excessively large NBT data | Causes extreme game tick lag when placed in Hoppers.
No video available yet

10. Fixed: Maliciously modified超长 chain drive wheel pairings | Causes severe server lag.
Video Link

11. Fixed: Exploit adding the "using_converts_to" tag to obtain arbitrary creative items.
Video Link

12. Fixed: Tampered Mechanical Arm distances causing ultra-long-range item transport | Crashes servers in certain scenarios.
Video Link

13. Fixed: Tampered chain drive wheels targeting the void causing 90° chain glitches | Crashes servers in certain scenarios.
Video Link

14. Fixed: Oddly distorted conveyor belts causing conveyor/rod duplication.
Video Link

15. Fixed: Maliciously modified chain drive wheels with thousands of targets causing severe server lag and chain duplication.
Video Link

16. Fixed: Maliciously modified Mechanical Arms with infinite item output exploits (e.g., adding "safenbt" lists to Arms).
Video Link

17. Fixed: Mechanical Arm item duplication with the Camouflage Panels mod.
Video Link

18. Fixed: Exploit allowing Filters to be retrieved via Andesite Hoppers.
Video Link

19. Fixed: Exploit using "burn" tags to obtain creative items.
Video Link

20. Fixed: Any duplication or creative item exploits involving entities (Armor Stands) | Uses entity removal feature.
Video Link

21. Fixed: Exploit allowing creative item acquisition via Rollers in specific versions.
Video Link

22. Fixed: Malicious addon exploit in Enigmatica: Industrialization allowing creative tag printing.
Video Link

23. Fixed: Create: Crafts & Additions exploit allowing infinite energy cell printing.
Video Link

24. Fixed: Integrated Dynamics exploit allowing Chicken Coop printing (causes GT machine lag).
Video Link

25. Fixed: Malicious NBT exploit allowing command execution.
Video Link

26. Fixed: Exploit in version 6.0.+ allowing fluid tank capacity tampering.
Video Link

27. Fixed: Quark Wire Mesh infinite lava exploit.
Video Link

28. Fixed: Exploit allowing item teleportation to the void via modified Mechanical Synthesizers.
Video Link

29. Fixed: Exploit allowing item teleportation to the void via modified Mechanical Synthesizers.
[No sample video]

30. Fixed: Maliciously modified Super Glue causing excessive adhesion checks (leads to severe server lag or crashes).
[No sample video]

31. Fixed: Maliciously modified Casing Chassis/Angled Chassis causing excessive adhesion checks (leads to severe server lag or crashes).
[No sample video]

32. Detected: Exploit allowing arbitrary creative item acquisition via modified Create: Big Cannons (tampered fuse data).
[No sample video]

33. Detected: Fixed a bug where printing giant blocks from the Twilight Forest mod would ignore the terrain and break bedrock.
[No sample video]

Acknowledgments

Special thanks to crackun24
- For reference Mixin code.
Additional thanks to:
- Qifei de Meigui (Rose of Takeoff), Kong Yu (Fearful Fish), air, crackun24, runner, CTR Server Owner, and 15 other Create public server owners—who provided test samples and post-fix support for this project.

Extra Special Thanks to Bilibili UP OWNER (content creator) 一只不屑的屑蜘蛛 (A Disdainful Trash Spider)
- If this griefer hadn’t intentionally crashed the author’s public server multiple times with bugged schematics, spread bugged schematics across countless servers, blocked the author on Bilibili, and spread rumors to slander the author when the fix was posted—this project would never have existed, and Create schematic bugs would not have been resolved so quickly!